Brushless Motor (BLDC) is a new electromechanical integrated motor with the development of semiconductor electronic technology, which is the product of the combination of modern electronic technology (including electronic power, microelectronics technology), control theory and motor technology. and ordinary Brushless Motor using armature winding rotary reversing different, brushless motor is the use of electronic reversing and magnetic steel rotation of the motor. Ordinary DC motor is the use of carbon brush for reversing, carbon brush reversing the existence of a great disadvantage, mainly include:
1, the spark caused by mechanical commutation of commutator and brush friction, electromagnetic interference, noise, short life.
2, the structure is complex, the reliability is poor, the fault is many, need to maintain frequently.
3, due to the existence of commutator, limit the rotor inertia further decline, affecting the dynamic performance.
Brushless motor is not a complete power system, brushless basic must be through the brushless controller is the control of the electrical regulation to achieve continuous operation. The ordinary carbon brush motor rotates the windings, and the brushless motor, whether it is in the outer or inward structure, rotates the magnet. Any motor is composed of a stator and a rotor.
It is important to note that we have to separate the brushless from other types of motors.
DC Motor: We also called the brush motor or carbon brush motor, is the oldest type of motor, but also the current number of motor types. Such motors may be used in radios, printers, etc. This motor is the use of carbon brush reversing, brushless motor is named for this motor.
Asynchronous motor: This is a very common type of motor in our life, industrial power, exhaust fan, electric fan are all using asynchronous motor. Asynchronous motor also does not brush, so occasionally call asynchronous motor for brushless motor, but the common definition of brushless motor is what we call brushless motor-BLDC.
1. The internal mechanical structure of the common high speed brush motor. The hub-type motor consists of a built-in high-speed brush motor heart, deceleration gear set, overrunning clutch, hub end cover and other components. High-speed brush has teeth hub-type motor belongs to the internal rotor motor.
2, common low-speed brush motor internal mechanical structure. The hub-type motor consists of carbon brush, phase converter, motor rotor, motor stator, motor shaft, motor end cover, bearing and other components. Low Speed brushless hub-and-pinion motor belongs to the outer rotor motor.
3. The internal mechanical structure of the common high speed brushless motor. The hub-type motor consists of a built-in high-speed brushless motor heart, planetary friction roller, overload clutch, output flange, end cover, hub housing and other components. High-speed brushless gear wheel motor belongs to internal rotor motor.
4, common low-speed brushless motor internal mechanical structure. The hub-type motor consists of motor rotor, motor stator, motor shaft, motor end cap, bearing and other components. Low-speed Brushless gear-wheel motor belongs to the outer rotor motor.